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H. A. W. WOOD ANO NORDFORS. BRAKING MECHANISM FOR ROTARY PRESSES.APPLICATION FILED JAN. 11. 1914. RENEWED 05c. 26. I918.

- Patented July 22, 1919.

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HENRY A. WISE WOOD, OF NEW YORK, N. Y., AND CONRAD NORDFORS, F JERSEYCITY HEIGHTS, NEW JERSEY, .ASSIG NORS, BY MESNE ASSIGNMENTS, TO WOODNEWS- PAPER MACHINERY CORPORATIO or GINIA. I v

NEW YORK, N. Y., A CORPORATION OF VIR- IBRAKING ISM FOR ROTARY PRESSES.

Specification of Letters Patent,

Patented July 22, 1919.

Application'filed January 17, 1914, Serial No. 812,725. Renewed December26, 1918. Serial No. 268,421.

United States, said VVooo residing. at New York, in the county of NewYork'and State of New York, and said NORDFORS residing at Jersey CityHeights, county of Hudson, and

State of New Jersey, have invented a new and useful Braking Mechanismfor Rotary Presses, of which the following is a specification.

This invention relates to a printing press, being particularlyapplicable to the multiple deck type of rotary web presses. I

The principal objects ofthe invention are to provide a quickly actingand simply constructed braking mechanism which is capable of checkingsimultaneously all the couples. of a multiple deck press so as to avoidthe difficulties ordinarily encountered in stopping web presses of thistype; and to provide means for connecting the several impressioncylinders with the powerin such a way that any one of the cylinders canbe disconnected simply andreadily from the power without affecting thetransmission of power to any of the other cylinders;

This invention constitutes an improvement over the application filed byHenry A Wise Wood on a braking mechanism for presses, Serial No.681,921, filedMarch 6, 1912.

Reference is to be had to'the accompanying drawings, in which' Figure 1is a side elevation of a portion of a multiple deck rotary web printingpress with a braking mechanism constructed in accordance with thisinvention: i

Fig. 2 is a similar view on-enlarged scale with some of the parts shownin section;

Fig. 3 is an end view of themechanism shown in Fig. 2; i

Fig. 4 is a central sectional view of the brake hub and connected partsenlarged;

Fig. 5 is a view similar to a portion of Fig. 4 on enlarged scaleshowing the cut-off pin; and

Fig. 6 is an end view of the mechanism shown in Fig. 5.

In the operation of web presses of the multiple deck type a seriousdifficulty has been encountered heretofore owing to the fact that whenthe press is stopped a brake at the driving end of the machine is alwaysapplied. This results obviously in slowing up the machine from the powerend so that the several decks, which are operated from the power througha series of gears, do not stop absolutely simultaneously but the onefarthest from the power will get the effect of the brake later than theone nearest the power, due to the back lash. Owing to this fact, in partat least, the stopping of these presses has to be carried out verycarefully in order to avoid the breaking of one or more of the webs andeven the stripping of the gears. This necessitates the operation of themachine by a skilled mechanic and also results in the loss of somelittle time every time the machine is stopped.

This invention is designed for th purpose of overcoming thesedifliculties, permitting the machine to be operated by a man oflessskill, and avoiding the web breaks even in the best operated plants.

The invention is shown as applied to am'ultiple deck rotary web printingpress having a frame .10, a series of inpression cylinders 11 andprinting plate cylinders 12. In this type of press the power istransmitted through gearing 13 to a gear 14,1'0- tatable on the sameaxis as one of the impression cylinders, that is, on the shaft 15. Thisgear meshes directly with another gear 14: preferably of the same sizeand on the same axis as another one of the impression cylinders. All thecouples are operated in the same way by a series of these gears. Each ofthe impression cylinder shafts is provided with a gear 16 meshing withanother gear on the printing cylinder shaft (not shown) and driving theprinting cylinder 12 at the same surface speed.

In order that each of the gears 14 may be driven at all times when themachine is in operation, whether all the decks of the press areoperating or not, these gears are shown as mounted looselyon the severalimpression cylinder shafts 15 by means, in the present instance, of abushing 18. For the purpose of connecting each of these gears with itsimpression cylinder shaft 15, a hub 19 is keyed to each impressioncylinder shaft 15 adjacent to the gear 14. One face of this hub isprovided with a socket 20 shown as having a lining 21. A plunger 22 ismounted 1n the face of the gear 11. The plunger 22 is spring-seated inthe driving gear 14 and provided with a pin 23 adapted to engage a camsleeve 24. The purpose of the pin and cam is to withdraw the plungerwhen it is desired to stop any of the cylinders from revolving. This isaccomplished by turning the pin one half a turn to the right. Thiscauses the pin to mount the canrincline thus drawing the plunger out ofthe hole or socket 20 of the brake hub 19.

The end of the pin or plunger 22 engaging the brake hub 19 is reduced indiameter to such an extent that should an overload be put on any of thecylinders it would break oil and thus save any very serious breakage ofthe cylinder or other parts of the machine. The pins or plungers 22normally engage with the brake hubs 19.

This hub 19 has another function as it is used as a brake hub. A brakeband 30 is provided on each brake hub, the two ends of which are engagedby pins 31 with a lever 32. These levers are pivoted on studs 33 on aframe. The two pins 31 by which theends of the brake band are connectedwith the lever, of course, are on opposite sides of the pivot stud 33and the swinging of the brake lever in one direction will cause the bandto tighten.

It will be understood, of course, that the ends of the brake bands areprovided with adjusting rods 29 and nuts 28 for the purpose of taking upany wear on the brake bands.

These brake levers 32 are arranged in pairs for each two adjacentimpression cylinders. The free ends of two of the brake levers whichproject from opposite sides of their respective brake cylinders andextend in opposite directions therefrom, are con nected by means of anair cylinder 3% which is freely hung between two of the brake operatinglevers. The head of this cylinder is provided with an extension 36 whichis attached to one of the levers by a pivot pin. lVithin the cylinder isa piston 37 which is spring-seated by a spring 38 against the oppositeend of the cylinder. This piston has a piston rod 39 which extendsthrough that head of the cylinder and it is pivotally connected with theend of the other brake operating lever. The piston, of course, is packedagainst leakage in any suitable man- Her and normally held in itsextreme inward position by the action of the spring 38.

The head of the cylinder 35 is provided with an opening or passage 39 towhich is connected a flexible pipe or hose 40. This in turn is connectedwith a main supply pipe 41. This pipe is connected with an air supplytank and is provided with the necessary operating valveor valves 42. Themain ll is connected by several pipes 40 with an air cylinder 34: foreach pair of impression cylinders.

In operation all of the plunger-s 22 of the impression cylinders whichit is desired to operate are allowed to move in by the cams to cause theend of each plunger to connect the gear with the brake hub. The power istransmitted through the several gears 11 to veach of the impressioncylinders so connected. If any of these cylinders are disconnected bythe turning of the cams it will make no difference in the transmissionof power to the others.

WVhen it is desired to stop the press the usual stopping mechanism (notshown) is operated, and at the same time or preferably slightlyafterward, the valve 42 is operated to admit air to the severalcylinders 341. Each of the cylinders 34 is freely suspended between twobrake levers, the piston being connected with one and the rod with theother and the piston is spring-pressed. Therefore, it will be clear thatthis operation, although performed simultaneously on all the impressioncylinders, will take client in such manner as to accommodate the couditions under which the press is being operated. In this way, theseveral printing couples are slowed down sin ultaneously butindependently when the press is stopped thus saving some time inproviding for the same action on all the couples.

This also equalizes the stopping strains among the several couples sothat none of the webs are likely to be broken, and applies a gradual butequal amount of brake power to all the cylinders, allowing them to cometo an even stop. As both the piston and cylinder are free members thewhole braking mechanism is equalized. The instant that either takes upthe looseness itthen becomes rigid and the other member is free to exertpressure therefrom in the opposite direction.

Although we have illustrated and clescribed a preferred embodiment ofthe invention as applied only to one type of press, we are aware of thefact that many modifications can be made therein by any person skilledin the art without departing from the scope of the invention asexpressed in the claims. Therefore, we do not wish to be limited to allthe details of construction, to the type of press herein shown anddescribed, nor to the features which are also shown in the aboveidentified application, but what we do claim is 1. The combination withthe two impression cylinders of a printing press deck, and means fordriving them, of a brake hub on each cylinder, a brake for each hub, alever for operating each brake, and means supported by said levers foroperating the two brakes simultaneously,

2. In a printing press, the combination with a pair of cylinders andmeans for driving said cylinders, of a brake or retarding mechanism foreach of said cylinders, and a single means comprising a movable cylinderand piston, for operating said brake or retarding mechanismssimultaneously and oppositely to retard both cylinders.

3. The combination of a pair of hubs, a brake for each hub, a leverconnected with each of said brakes for operating it, a movable cylinderand piston, the piston being connected with one of said levers and thecylinder with the other, and means whereby fluid under pressure can beadmitted into the cylinder for moving the cylinder and piston apart toapply the brakes to the two hubs.

4. The combination with a multiple deck printing press, of meansapplicable to one of the members of each printing couple forindependently retarding the rotation thereof when the press is beingstopped, and a cylinder and piston each connected to one retarding meansof a pair for operating the pair of retarding means simultaneously.

5. The combination of a pair of cylinders, a brake band for eachcylinder, a lever connected with each of said brake bands for operatingthem, a cylinder and piston, the piston being connected with one of saidcylinders and the cylinder with the other, said levers constituting thesole support for said cylinder and piston, yielding means for holdingthe piston in one position, and means whereby air can be admitted intothe cylinder for moving the cylinder and piston apart and simultaneouslyoperating both brake band levers.

6. In a braking device, the combination of a pair of hubs, a separatebrake for each hub, .a separate lever connected with each of said brakesfor operating them, a cylinder and piston, the piston being connectedwith one of said brakes, and the cylinder independently connected withthe other, means whereby air can be admitted into the cylinder forforcing the cylinder and piston apart to apply the brakes to the twohubs, and means for automatically forcing the piston into the cylinderwhen the air pressure is released to release the brakes.

In testimony whereof we have hereunto set our hands, in the presence oftwo subscribing witnesses.

HENRY A. WVISE WVOOD. CONRAD NORDFORS.

Witnesses:

P. M. STOEBER, LILLIAN C. JoNEs.

Copies of this patent may be'obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

